Afgan Stew in a slow cooker

INGREDIENTS

• 2 1/2 pounds lamb stew meat - I use neck fillets, generally 6 cut iinto large chunks 1/3 cup olive oil 3/4 pound onions, diced large , softened
• 4 teaspoon chopped garlic
• 2 teaspoons turmeric 1/4 teaspoon ground cardamom
• 1/2 teaspoon crushed red pepper - or to taste
• 1/2 teaspoon cinnamon
• 32 ounce can chopped tomatoes
• 1 cup beef stock
• Salt, to taste